[MCTG] Fwd: Photonics Test & Meas eNews: Frequency combs find exoplanets, sensors unlock geothermal energy
BC
omni at mcn.org
Wed Mar 25 14:57:50 PDT 2015
Just to bend your mind around the pace of optical technology...~BC
LFW eNewsletter Newsletter
LFW eNewsletter | March 25
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*March 25, 2015 Test & Measurement*
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*View this newsletter online
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**
*Highlights of this issue:*
• Laser frequency comb in SM fiber can aid search for exoplanets <#1>
• Cornell CMOS mid-IR optical frequency comb fits on 1 mm chip <#3>
• Cryogenic optical-lattice clocks will enable mapping Earth's gravity <#6>
• He-Ne lasers meet metrology challenges at PTB <#7>
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*Photonics Test & Measurement News and Featured Articles*
A laser frequency comb aids in exoplanet search
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**Laser frequency comb in SM fiber can aid search for exoplanets
(VIDEO)*
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A solar telescope can be combined with a laser frequency comb (LFC) to
allow spectral analysis of distant stars with unprecedented accuracy,
which can potentially aid the hunt for exoplanets.*View more >>*
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**WEBCAST April 15: Laser Measurements Critical to Successful AM *
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Specifically, when a laser is used during additive manufacturing (AM)
processes, knowing how the laser interacts with the material is crucial
to the success of the parts being built up.*View more >>*
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Cornell CMOS-compatible mid-IR frequency comb fits on a chip
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**Cornell CMOS mid-IR optical frequency comb fits on 1 mm chip*
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The CMOS-compatible miniature frequency comb could lead to highly
sensitive handheld gas sensors for anything from atmospheric research to
disaster-recovery missions.*View more >>*
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**Distributed fiber sensing systems could unlock geothermal energy*
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In the last five years, advances in fiber-optic technology have enabled
cables to gather around a terabyte of detailed seismic and temperature
data per day in downhole environments.*View more >>*
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The delay scanning cross correlator has a new rival
<http://e1.lfw-media.com/c.html?ufl=a&rtr=on&s=x9w556,g41g,ie,hfan,iqu5,etzw,fdtu>
**Single-shot cross-correlator has > 10exp10 dynamic range*
<http://e1.lfw-media.com/c.html?ufl=a&rtr=on&s=x9w556,g41g,ie,lh7u,f7zg,etzw,fdtu>*
Promising for constructing and optimizing ultra-high peak-power laser
systems, the new device is comparable to a delay-scanning
cross-correlator (DSCC).*View more >>*
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**Cryogenic optical-lattice clocks will enable mapping Earth's gravity*
<http://e1.lfw-media.com/c.html?ufl=a&rtr=on&s=x9w556,g41g,ie,kr0b,alsk,etzw,fdtu>*
Applications of the clock include measuring different time delays
produced during varied driving routes for a motor vehicle carrying the
clock, allowing gravitational potential to be mapped.*View more >>*
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He-Ne lasers meet metrology challenges
<http://e1.lfw-media.com/c.html?ufl=a&rtr=on&s=x9w556,g41g,ie,k0o7,m4oq,etzw,fdtu>
**He-Ne lasers meet metrology challenges at PTB*
<http://e1.lfw-media.com/c.html?ufl=a&rtr=on&s=x9w556,g41g,ie,aara,ifp3,etzw,fdtu>*
The He-Ne laser is now the preferred laser for specific high-value
applications, including precision measuring applications in
interferometers and spectrometers.*View more >>*
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**NIST to offer laser-interferometric calibration service for
accelerometers*
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Based on laser interferometry, the NIST system will have a sensitivity
of a few nanometers and will be able to measure at frequencies up to 50
kHz. *View more >>*
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